CN112038962A - Handcart grounded under handcart switch cabinet and method - Google Patents
Handcart grounded under handcart switch cabinet and method Download PDFInfo
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- CN112038962A CN112038962A CN202010942078.0A CN202010942078A CN112038962A CN 112038962 A CN112038962 A CN 112038962A CN 202010942078 A CN202010942078 A CN 202010942078A CN 112038962 A CN112038962 A CN 112038962A
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- handcart
- energy storage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
- H02B11/04—Isolating-contacts, e.g. mountings or shieldings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/26—Arrangements of fuses, resistors, voltage arresters or the like
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/28—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model provides a handcart under handcart cubical switchboard grounding handcart includes: the chassis vehicle, the operating mechanism and the grounding detection device are connected with the frame; the grounding detection device comprises a circuit breaker, a grounding bar, a contact and a contact arm, wherein one end of the contact arm is connected with the sensor, and the other end of the contact arm is connected with the contact; the contact is connected with the grounding bar through a breaker; the operating mechanism is connected with the circuit breaker and used for controlling the opening and closing actions of the circuit breaker; the chassis vehicle is arranged at the bottom of the frame and used for adjusting the position of the grounding handcart, so that the requirement of grounding at two ends of a working place during single-interval maintenance of a 10kV switch cabinet is met, and the personal safety of maintenance personnel is guaranteed; this ground connection handcart has sensor and circuit breaker, has avoided ground connection handcart mistake to close on the electrified circuit, has ensured electric wire netting equipment and fortune dimension personnel's personal safety.
Description
Technical Field
The disclosure relates to a handcart grounded under a handcart switch cabinet and a method.
Background
The existing grounding handcart is a bus grounding handcart, is mainly suitable for the whole-section maintenance of a 10kV switch cabinet, does not have a power testing function, can only close a line side grounding knife during the single-interval maintenance of the 10kV switch cabinet, and cannot meet the requirement that the two ends of a working place are connected with a ground wire in a hanging mode.
The problem that the isolation part can not be connected with the ground wire under the handcart switch cabinet when the 10kV switch cabinet is maintained at a single interval can not be solved, the requirement that the ground wires are connected at two ends of a working place can not be met, the grounding handcart is frequently mistakenly connected to an electrified interval by mistake during the operation of the handcart at present, and the technical problem to be solved is how to avoid mistakenly connecting the grounding handcart to the electrified interval by mistake.
Disclosure of Invention
In order to solve the technical problem, the present disclosure provides a handcart connected to a grounding switch cabinet and a method.
In a first aspect, the present disclosure provides a handcart under handcart cubical switchboard, include: the chassis vehicle, the operating mechanism and the grounding detection device are connected with the frame; the grounding detection device comprises a circuit breaker, a grounding bar, a contact and a contact arm, wherein one end of the contact arm is connected with the sensor, and the other end of the contact arm is connected with the contact; the contact is connected with the grounding bar through a breaker; the operating mechanism is connected with the circuit breaker and used for controlling the opening and closing actions of the circuit breaker; the chassis vehicle is arranged at the bottom of the frame and used for adjusting the position of the grounding handcart.
In a second aspect, the present disclosure also provides a method for using a handcart under ground as described in the first aspect, including:
when the handcart switch cabinet is subjected to single-interval power failure maintenance, the original handcart of the switch cabinet is shaken out, a grounding handcart below the handcart switch cabinet is pushed in, and a contact is in isolated contact with the lower part of the switch cabinet;
judging whether the interval is electrified or not through the cooperation of a sensor on the contact arm and the electrified display device;
if the electrified display device displays no electricity, the circuit breaker which is connected with the grounding bar and the contact is switched on through the operating mechanism, so that reliable grounding is realized;
if the electrified display device displays electricity, the grounding handcart breaker is kept to be disconnected and switched on through the operating mechanism, and the electrified interval is prevented from being grounded by mistake.
Compared with the prior art, this disclosure possesses following beneficial effect:
1. one end of a contact arm is connected with a sensor, and the other end of the contact arm is connected with a contact; the contact is connected with the grounding bar through the circuit breaker, so that the requirement of grounding at two ends of a working place during single-interval maintenance of the 10kV switch cabinet is met, and the personal safety of maintenance personnel is guaranteed; this ground connection handcart has sensor and circuit breaker, has avoided ground connection handcart mistake to close on the electrified circuit, has ensured electric wire netting equipment and fortune dimension personnel's personal safety.
2. According to the technical scheme, when a single-interval power failure of a 10kV handcart switch cabinet is maintained, an original handcart of the switch cabinet is shaken out, a lower grounding handcart is pushed in, a handcart contact is in isolated contact with the lower part of the switch cabinet, a sensor is arranged on a handcart contact arm, and a high-voltage electrified display device is arranged on a front panel, so that the technical problem of mistakenly closing the grounding handcart onto a charged interval by mistake during single-interval maintenance is solved, the electricity testing function is added, and a circuit breaker which is connected with a grounding bar and a contact is closed after the interval is confirmed to be powered off, namely the isolation and the grounding end are reliably grounded at the interval; if the grounding handcart is pushed in, the high-voltage electrified display device displays electricity, the grounding handcart breaker is forbidden to be switched on, the phenomenon that the electrified handcart is grounded at intervals by mistake is prevented, and the personal safety of maintainers is guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural view of a handcart grounded under a handcart switch cabinet according to the present disclosure;
fig. 2 is a schematic structural diagram of an electrified display device according to the present disclosure;
fig. 3 is a schematic structural diagram of an operating mechanism of the present disclosure;
fig. 4 is a circuit diagram of a ground loop and a tank loop of the present disclosure;
fig. 5 is a circuit diagram of a closing circuit and a latching circuit of the present disclosure;
FIG. 6 is a circuit diagram of the opening circuit and the auxiliary switch circuit of the present disclosure;
FIG. 7 is a name diagram of various components of the circuit of the present disclosure;
FIG. 8 is a state wiring diagram of the circuit of the present disclosure;
in the figure: 104. a ground bar; 105. fixing screws; 106. insulating support; 107. a circuit breaker; 108. an operating mechanism; 109. a supporting plate; 110. a chassis truck; 111. a high voltage live display device; 112. a frame; 201. an energy storage indicating unit; 202. the circuit breaker opening and closing mechanical indicating unit; 203. a counter; 204. a high voltage live display unit; 205. a closing button; 206. A manual energy storage unit; 207. a brake separating button; 208. a hand truck handle; 209. a handcart screw; 210. an aviation plug; 1. a microswitch; 2. a pin; 3. a limiting rod; 4. a slider; 5. a first crank arm; 6. an energy storage transmission wheel; 7. an energy storage shaft; 8. a roller; 9. a power storage retention latch; 10. A closing spring; 11. a manual energy storage worm; 12. closing an electromagnet; 13. a manual energy storage drive worm gear; 14. a motor drive sprocket; 15. an output shaft of the motor; 16. an energy storage motor; 17. Interlocking drive bent plates; 18. a drive chain; 19. an energy storage holding shaft; 20. latching the electromagnet; 21. a second crank arm; 22. a cam; 23. an energy storage sprocket; 24. connecting plates; 25. energy storage display board.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Interpretation of terms:
handcart-type cubical switchboard: comprises a cabinet body, wherein the front of the cabinet body is provided with an upper door, a middle door and a lower door; is characterized in that; a detachable baffle is arranged in the cabinet body, and the baffle separates a circuit breaker chamber, a bus chamber and a cable chamber of the cabinet body; a hole into which a moving contact of the integrated current transformer can be inserted is formed in the baffle; the handcart rail is arranged on the ground and is far away from the static contact of the isolating plug, the handcart rail is arranged in the middle of the switch cabinet (also called a central switch cabinet) and is close to the static contact of the isolating plug, and the interchangeability of the handcart part is good.
Grounding the handcart: the contact and the contact arm are installed on the handcart, and the primary main loop is grounded through the short circuit of the contact arm connecting copper bar, so that the reliable grounding of the loop is effectively ensured, and the maintenance is always in a safe environment.
Examples
As shown in fig. 1, a handcart under-ground switch cabinet comprises: the chassis vehicle, the operating mechanism, the grounding detection device and the charged display device are connected with the frame; the grounding detection device comprises a circuit breaker, a supporting plate, an insulating support, a grounding bar, a sensor, a contact arm and a contact; the operating mechanism is arranged on the bottom surface in the frame and is mounted close to one side surface in the frame, the bottom of the breaker is mounted on a supporting plate, the supporting plate is connected with the bottom surface in the frame, the breaker is also connected with the grounding bar and the contact, and the breaker controls the connection state of the grounding bar and the contact through a gate; an insulating support is arranged at the top of the circuit breaker and used for installing a grounding bar, one end of the grounding bar is arranged on the insulating support on the circuit breaker through a fixing screw, and the other end of the grounding bar is connected with a supporting plate and penetrates through the supporting plate to be grounded; one end of the sensor is connected with the grounding bar, the other end of the sensor is connected with the contact through the contact arm, and the contact is used for being in contact with the cabinet body electrostatic contact.
Furthermore, the operating mechanism comprises an installation plate, an energy storage unit, a transmission unit and a closing unit, wherein the energy storage unit, the transmission unit and the closing unit are connected with the installation plate; the energy storage unit comprises an energy storage shaft and an energy storage retaining shaft, the energy storage shaft is connected with the closing spring through a crank arm, an energy storage driving wheel is mounted on the energy storage shaft, and the energy storage driving wheel is connected with the energy storage shaft through an energy storage retaining catch; the switching-on unit comprises a switching-on electromagnet, a cam, a connecting plate, a rotating shaft and a microswitch; the micro switch is connected with the rotating shaft, the rotating shaft is connected with the energy storage shaft in a matching way through the connecting plate, and the matching connection is realized by forming a matching relation between the cam and the connecting plate; the cam is provided with a cylindrical protruding structure which can be matched with the through hole on the connecting plate; one end of the cam is connected with the energy storage shaft in a sliding manner, and particularly, the cam is arranged on a groove of the energy storage shaft and can slide in the groove; the closing electromagnet is used for adjusting the position of the cam in the groove of the energy storage shaft by closing the electromagnet to generate magnetism, so that whether the protruding structure is matched with the connecting plate or not is adjusted, and the micro switch is controlled to be started and closed. The transmission unit comprises a chain wheel connected with the energy storage shaft, and the chain wheel is driven to rotate by a chain transmission mechanism driven by a motor or a manual energy storage structure, so that the rotation and energy storage effects of the energy storage shaft are realized.
A connecting plate connected with the energy storage shaft through a cam, and a closing electromagnet connected with the energy storage shaft,
the roller is connected with one end of the energy storage retaining pawl, and the other end of the energy storage retaining pawl is connected with the energy storage retaining shaft
The energy storage device comprises a microswitch, a pin, a limiting rod, a sliding block, a first crank arm, an energy storage driving wheel, an energy storage shaft, a roller, an energy storage retaining pawl, a closing spring, a manual energy storage worm, a closing electromagnet, a manual energy storage driving worm wheel, a motor driving chain wheel, a motor output shaft, an energy storage motor, an interlocking driving bent plate, a driving chain, an energy storage retaining shaft, a locking electromagnet, a second crank arm, a cam, an energy storage chain wheel, a connecting plate and an energy storage display board.
The operating mechanism comprises a first mounting plate and a second mounting plate which are arranged in parallel, an energy storage shaft and an energy storage maintaining shaft are mounted on the first mounting plate and the second mounting plate, one end of the energy storage shaft is connected with the first mounting plate, the other end of the energy storage shaft is connected with the second mounting plate, a locking electromagnet is arranged in the area, close to the first mounting plate, of the energy storage shaft, one end of the energy storage shaft is connected with a first closing spring through a first crank arm, and the other end of the energy storage shaft is connected with a second closing spring through a second crank arm; the energy storage shaft is provided with an energy storage chain wheel, an energy storage driving wheel and a cam;
further, the operating mechanism is a spring energy storage operating mechanism.
Furthermore, the breaker frame contains closing unit, the separating brake unit that one or several declutch electro-magnets constitute, auxiliary switch and indicating device. The electrified display device in the front is provided with a closing and opening button, a manual energy storage operation hole, a spring energy storage state indicator, a closing and opening indicator and the like.
Furthermore, one end of the energy storage transmission shaft is connected with the sliding block, the other end of the energy storage transmission shaft is connected with the roller, the sliding block is connected with the energy storage chain wheel through a pin shaft, the energy storage chain wheel is connected with the motor transmission chain wheel through a transmission chain, the motor transmission chain wheel is connected with the motor output shaft, and the motor output shaft is driven by the energy storage motor to rotate. The motor transmission chain wheel is also connected with a manual energy storage transmission worm wheel, and the motor transmission chain wheel can be driven to rotate through the rotation of the manual energy storage transmission worm wheel. The roller is connected with one end of the energy storage retaining pawl, and the other end of the energy storage retaining pawl is connected with the energy storage retaining shaft.
Furthermore, one end of the cam is connected with one end of the connecting plate, the other end of the connecting plate is connected with the energy storage indicating plate, a rotating shaft is installed on the energy storage indicating plate, two ends of the rotating shaft are respectively connected with the first mounting plate and the second mounting plate, and a micro switch is arranged on the rotating shaft.
Furthermore, the electrified display device comprises an energy storage display unit, a circuit breaker opening and closing mechanical indicating unit, a counter, a closing button, a manual energy storage unit and a switching-off button.
Furthermore, the system also comprises an aviation plug for controlling line aggregation.
Furthermore, the frame is connected with a handcart handle and a handcart lead screw, the handcart handle is used for assisting a hand to adjust the position of the handcart, and the handcart lead screw is used for limiting.
The chassis is arranged at the bottom of the frame, the top of the frame is provided with an operating mechanism and a charged display device,
preferably, the frame is a U-shaped frame, and when the frame is mounted on the grounding handcart, the opening direction of the U-shaped frame is horizontally arranged.
Further, the circuit that ground handcart under handcart cubical switchboard includes: a closing loop, a locking loop, a separating loop and an auxiliary switch loop, which can be specifically seen in fig. 4-7; the HQ is a closing electromagnet and is used for controlling a switch to be closed; the TQ is a brake-separating electromagnet and is used for controlling the switch to separate; m is an energy storage motor used for storing energy for the switching switch; HK is an auxiliary switch and is used for switching during the division and operation; V2-V4 are rectifier elements for rectifying the circuit; XT is an aviation plug and is used for controlling line collection; LXPi is a wiring terminal used for connecting a handcart connecting wire; KO is an anti-jump relay for preventing the switch from jumping; SP1-SP3 are microswitches used for switching after the energy of a closing spring is stored; SP5 is a limit switch for realizing the locking function, S8 is a chassis auxiliary switch for switching during the experiment position; s9 is a chassis auxiliary switch for switching working positions; y1 is a locking electromagnet for closing a locking loop; R0-R1 are resistors and are used for dividing the voltage of the resistors; and L1-L11 are connecting wires for realizing function conversion.
The lower grounding handcart mainly comprises a frame, a contact arm, an insulator, an insulating sleeve, a chassis, a circuit breaker, a sensor, a live display device, a grounding bar and the like. When the 10kV handcart switch cabinet single interval power failure maintenance is carried out, an original handcart of the switch cabinet is shaken out, a grounding handcart under the handcart is pushed in, a handcart contact is in isolated contact with the lower part of the switch cabinet, a sensor is arranged on a handcart contact arm, a high-voltage electrified display device is arranged on a front panel, and after the interval is confirmed to be in power failure, a circuit breaker which is connected with a grounding bar and the contact is switched on, namely the isolation and the grounding end are reliably grounded under the interval. If the high-voltage electrified display device displays electricity after the grounding handcart is pushed in, the circuit breaker of the grounding handcart is forbidden to be switched on, and the phenomenon that the electrified handcart is grounded at intervals by mistake is prevented.
The requirement of grounding at two ends of a working place during single-interval maintenance of the 10kV switch cabinet is met, and the personal safety of maintenance personnel is guaranteed. This ground connection handcart has sensor and circuit breaker, has avoided ground connection handcart mistake to close on the electrified circuit, has ensured electric wire netting equipment and fortune dimension personnel's personal safety.
Example 2
A method for using a handcart under ground in a handcart switch cabinet as described in embodiment 1, comprising:
when the handcart switch cabinet is subjected to single-interval power failure maintenance, the original handcart of the switch cabinet is shaken out, a grounding handcart below the handcart switch cabinet is pushed in, and a contact is in isolated contact with the lower part of the switch cabinet;
judging whether the interval is electrified or not through the cooperation of a sensor on the contact arm and the electrified display device;
if the electrified display device displays no electricity, the circuit breaker which is connected with the grounding bar and the contact is switched on through the operating mechanism, so that reliable grounding is realized;
if the electrified display device displays electricity, the grounding handcart breaker is kept to be disconnected and switched on through the operating mechanism, and the electrified interval is prevented from being grounded by mistake.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. The utility model provides a handcart of ground handcart under handcart cubical switchboard which characterized in that includes: the chassis vehicle, the operating mechanism and the grounding detection device are connected with the frame; the grounding detection device comprises a circuit breaker, a grounding bar, a contact and a contact arm, wherein one end of the contact arm is connected with the sensor, and the other end of the contact arm is connected with the contact; the contact is connected with the grounding bar through a breaker; the operating mechanism is connected with the circuit breaker and used for controlling the opening and closing actions of the circuit breaker; the chassis vehicle is arranged at the bottom of the frame and used for adjusting the position of the grounding handcart.
2. The under-cabinet grounded handcart of claim 1, wherein the operating mechanism comprises a mounting plate, and an energy storage unit, a transmission unit and a closing unit connected with the mounting plate.
3. The handcart according to claim 2, wherein the energy storage unit comprises an energy storage shaft and an energy storage retaining shaft, the energy storage shaft is connected with the closing spring through a crank arm, and an energy storage driving wheel is mounted on the energy storage shaft and connected with the energy storage shaft through an energy storage retaining latch.
4. The handcart according to claim 2, wherein the transmission unit comprises a chain wheel connected with the energy storage shaft, and the chain transmission mechanism is driven by a motor or a manual energy storage structure to drive the chain wheel to rotate, so that the rotation and energy storage of the energy storage shaft are realized.
5. The handcart of claim 2, wherein the switching unit comprises a switching electromagnet, a cam, a connecting plate, a rotating shaft and a microswitch; the micro switch is connected with the rotating shaft, the rotating shaft is connected with the energy storage shaft in a matching mode through the connecting plate, and the connecting plate and the cam form a matching relation in the matching connection mode, so that connection is achieved.
6. The handcart of claim 5, wherein the cam has a cylindrical protrusion thereon, the protrusion being capable of engaging with a through hole in the connecting plate; one end of the cam is in sliding connection with the energy storage shaft, and the closing electromagnet is used for adjusting the position of the cam on the energy storage shaft by generating magnetism to control the starting and closing of the microswitch.
7. The handcart of claim 1, further comprising a live display device connected to the frame, the live display device comprising an energy storage display unit, a mechanical indication unit for opening and closing the circuit breaker, a counter, a closing button, a manual energy storage unit, and an opening button.
8. The handcart of claim 1, wherein the grounding detection device further comprises a supporting plate and an insulating support, the bottom of the breaker is mounted on the supporting plate, the supporting plate is connected with the bottom surface in the frame, the insulating support is mounted at the top of the breaker, and the insulating support is used for mounting the grounding bar.
9. The handcart according to claim 3, wherein one end of the grounding bar is mounted on the insulating support of the breaker by a fixing screw, and the other end of the grounding bar is connected with the supporting plate and passes through the supporting plate to be grounded.
10. A method of using a hand truck with a ground under a hand truck switchgear as claimed in any of claims 1 to 9, comprising:
when the handcart switch cabinet is subjected to single-interval power failure maintenance, the original handcart of the switch cabinet is shaken out, a grounding handcart below the handcart switch cabinet is pushed in, and a contact is in isolated contact with the lower part of the switch cabinet;
judging whether the interval is electrified or not through the cooperation of a sensor on the contact arm and the electrified display device;
if the electrified display device displays no electricity, the circuit breaker which is connected with the grounding bar and the contact is switched on through the operating mechanism, so that reliable grounding is realized;
if the electrified display device displays electricity, the grounding handcart breaker is kept open through the operating mechanism, and the electrified interval grounding is prevented from being mistakenly conducted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942078.0A CN112038962A (en) | 2020-09-09 | 2020-09-09 | Handcart grounded under handcart switch cabinet and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942078.0A CN112038962A (en) | 2020-09-09 | 2020-09-09 | Handcart grounded under handcart switch cabinet and method |
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| CN112038962A true CN112038962A (en) | 2020-12-04 |
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| CN202010942078.0A Pending CN112038962A (en) | 2020-09-09 | 2020-09-09 | Handcart grounded under handcart switch cabinet and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114825142A (en) * | 2022-05-26 | 2022-07-29 | 国网河北省电力有限公司石家庄供电分公司 | Handcart type circuit breaker replacing method |
| CN114876291A (en) * | 2022-03-29 | 2022-08-09 | 湖南创安防爆电器有限公司 | Automatic interlocking locking device and quick-opening door |
| CN116544046A (en) * | 2023-07-05 | 2023-08-04 | 江苏安靠智能输电工程科技股份有限公司 | Gas-insulated neutral point grounding switch of transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114876291A (en) * | 2022-03-29 | 2022-08-09 | 湖南创安防爆电器有限公司 | Automatic interlocking locking device and quick-opening door |
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| CN114825142B (en) * | 2022-05-26 | 2024-03-12 | 国网河北省电力有限公司石家庄供电分公司 | Handcart type breaker replacement method |
| CN116544046A (en) * | 2023-07-05 | 2023-08-04 | 江苏安靠智能输电工程科技股份有限公司 | Gas-insulated neutral point grounding switch of transformer |
| CN116544046B (en) * | 2023-07-05 | 2023-10-03 | 江苏安靠智能输电工程科技股份有限公司 | Gas-insulated neutral point grounding switch of transformer |
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Application publication date: 20201204 |